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Chanchamina Gold-Silver-Lead Deposit #46

Producer in Junin, Peru with commodities Gold, Silver, Lead, Zinc, Copper
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Production statistics
  17. Reserves and resources
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10068879
MRDS ID W002151
Record type Site
Current site name Chanchamina Gold-Silver-Lead Deposit #46
Alternate or previous names Tulumachay, Don Carlos

Geographic coordinates

Geographic coordinates: -75.78304, -11.38122 (WGS84)
Elevation 4000
Relative position ABOUT 10 KM NNW OF TARMA, ON A HILL BETWEEN THE UCPIN AND LUTIA VALLEYS NEAR THE SETTLEMENTS OF CHANCHA AND HUANCOY IN THE PROVINCIA DE TARMA.

Site location context

Political divisions (FIPS codes)

Junin(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Junin

Comments on the location information

  • NO. 46 METALLOGENIC MAPS OF PERU, 1969, SHOWN AS GOLD DEPOSIT.

Commodities

Commodity Importance
Gold Primary
Silver Primary
Lead Primary
Zinc Critical Secondary
Copper Secondary

Comments on the commodity information

  • PRIMARY MINERALS INCLUDE GOLD, ASSOCIATED WITH AND OCCURING AS INCLUSIONS IN PYRITE.

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Pyrrhotite Ore
Silver Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) Hydrothermal-Silicification Kaolinization

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
    Rock unit name Puy Puy Stock
    Rock description Puy Puy Stock
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite

Nearby scientific data

(1) -75.78304, -11.38122
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Earlier Rocks Aris Cut By Monzonite, Quartz Monzonite, And Quartz Porphyry Dikes That Strike West Northwest, Dip Steeply North And Attain A Length Of One Km. Shale And Limestone Of Liassic Age And Limestone Of Jurassic Age Are Faulted Against The Puy-Puy Stock And West Of Chanchamina Limestone Of Early Cretaceous Age Is Faulted Against The Same Stock

Ore body information

  • General form IRREGULAR

Controls for ore emplacement

  • See Comments

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1924

Mining district

District name La Union

Ownership information

  • Type Owner-Operator
    Owner Compania Minera Chanchamina

Production statistics

  • Year 1942
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^Avg. 30.3 G Au/T (1936 - 1942)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 30g/mt
  • Year 1942
    Period 1936 - 1942
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^Avg. 30.3 G Au/T
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 30g/mt
  • Year 1947
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^Avg. 26.3 G Au/T (1943 - 1947)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 26g/mt
  • Year 1947
    Period 1943 - 1947
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^26.3 G Au/T
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 26g/mt

Comments on the production information

  • AVERAGE GRADE OF ORE EXTRACTED IS 0.13 OZ/T AU, 7.5 OZ/T AG, 3% PB, 2.5% ZN. THE TULUMACHA Y MANTO (BLOCK) HAD 0.90 OZ/T AU, 5.0 OZ/T AG, 1.5% PB. TULUMACHAY BODY, DISCOVERED IN 1936, PRODUCED 90% OF THE AU PRODUCTION AND ALMOST 100% DURING 1937-1942.

Reserves and resources

  • Type In-situ
    Estimate year 1961
    Total resources 135000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 10 g/mt Gold Major 1961
    Silver Ag 250 g/mt Silver Major 1961
    Lead Pb 4.3 wt-pct Lead Major 1961
    Zinc Zn 3 wt-pct Zinc Minor 1961

Comments on the reserve resource information

  • RESERVES ESTIMATED IN SIMONS REPORT 1960 IS IN BRECCIA-IN ADDITION SEVERAL THOUSAND TONS OF 1.8 G/TON/AU AND SOME MANGANIFEROUS ORE 9 G/TON/AU AND 300 G/TON/AG
  • ESTIMATED BY GOUDARZI 3/74
  • INSUFFICIENT DATA 3/74 TO MAKE ESTIMATE. METALLOGENIC MAPS OF PERU INDICATE A DEPOSIT CONTAINING BETWEEN ONE AND 10 MILLION TONS OF ORE.

Workings at the site

  • Type of workings Underground
    Length 15000M

Comments on the workings information

  • WORKINGS IN AN AREA OF 1200 X 800 M.

Reference information

Bibliographic references

  • Deposit

    SIMONS, FRANK, 1960, UNPUBLISHED REPORT, P. 410-415

  • Deposit

    PERU-MAPA METALOGENETICO, 1969, AND, GUIA PARA EL MAPA METALOGENETICO DEL PERU, SOCIEDAD NACIONAL DE MINERIA Y PETROLEO, LIMA, PERU, NOV. 1969

  • Deposit

    DELAS CASAS, F., 1961, MINA CHANCHAMINA: BANCO MINERO PERU, INGEMMET B4368.

  • Deposit

    1960 COMPILE FRANK SIMONS, UNPUB. REPORT

  • Production

    FRANK SIMONS (1969), DE LAS CASAS (1961).

  • Reserve-Resource

    METALLOGENIC MAPS OF PERU. 1969, 1972

General comments

Subject category Comment text
Deposit SEE RECORD NUMBER JUN0007.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1974 Shaffer, Glenn L. U.S. Geological Survey
Updater 01-JUN-1994 Page, Norman J. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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